1932 (24 Sep) Von Gronau Round the World flight cover from Shanghai to Manila, attractively franked, violet cachet on front and "Via the German Round the World Flight by Capt. Wolfgang von Gronau with his Flying Boat: The Doernier Wal", with September 27 arrival, v.f. (Cat No. AAMC TO1168h) (Image)

Est.$750

1937 Inaugural Clipper Flights, 13 covers prepared by Dr. Licheson, first flights Canton-Honolulu, Hong-Kong-Manila, Guam, Macao-San Francisco, etc., covers franked with China, Hong Kong and Macao adhesives, with corresponding cachets and markings, fine-v.f. (Image)

Est.$500